#header{
    background-image: linear-gradient(to bottom,#212121,#616161);/*向下渐变，从黑到灰*/
    min-height: 30px;
    text-align: center;
    display: flex;
    justify-content: space-between;
    margin-top: -1px;
}
.header-font{
    color: white;
    /*设置行高，只能设置文字(文字垂直居中)*/
    line-height: 30px;
    font-weight: 700;
}

/*返回*/
#header-control{
    width: 33%;
    padding-left: 6px;
    display: flex;
    align-items: center;
}
#header-control div:nth-child(1){
    height: 18px;
    width: 18px;
    background: url("../static/img/icon/material/返回.svg") no-repeat;
    /*按容器最大尺寸显示*/
    background-size: contain;
}
/*信息、条数*/
#msg{
    width: 34%;
    line-height: 30px;
    font-weight: 700;
}
/*加号*/
#function{
    width: 33%;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding-right: 8px;
}
#add{
    height: 22px;
    width: 22px;
    background: url("../static/img/icon/material/加号.svg");
    background-size: contain;
}